Installation; Vacuum System; Electrical Connection/ Checks; Motor Mounting Instructions - BUSCH COBRA NC 0100 B Manuel D'installation Et De Maintenance

When the vacuum pump is equipped with a direct cooling system,
imperatively refer to "Adjustment of the thermostatic valve (option)
and adjustment of the temperature class".
In the table below, you will find the possible alternative of temperature
classes depending of the cooling system and the maximal motor
frequency:
Cooling sys-
Direct cooling
tem
Temperature Max. motor
Type
class frequency
T4 (i/o) 50 Hz
NC 0300 B
T3 (i/o) 50 Hz

Installation

Vacuum system

The vacuum system must be placed in a horizontal position on a level
surface.
Make sure there is enough space around the pump system (at least 1.5
m) for service work, etc.
The pipes must be cleaned before assembly. Be sure to completely
remove any foreign matters such as welding slag and swarf. Flush or
blow out the pipes before connecting up.
Install the inlet pipe (into the nominal diameter of the pump flange or
the inlet valve port) as short as possible because of resistance in the
pipeline. If longer pipelines (> 5 m) are planned, a wider nominal
diameter is necessary.
Connect the pipes in such a way so that no tensile or compressive
stress is placed on the system, using bellows if necessary.
WARNING
A filter or a screen has to be installed on the suction side of the
vacuum pump, in order to avoid any suction of particles and
foreign matter in the vacuum pump (explosion danger!).
The filter or the screen should have a mesh size £ 0.2mm
(DN50 flange: Busch Part No. 0534 562 610).
Connect the screen to earth via the earthing M6 thread.
Earthing
The inlet and outlet pipes must be laid with gradients so that no
condensation can enter the pump.

Electrical connection/ Checks

Electrical installation may only be carried out by a specialist.
l Make sure that the requirements according to EMC-Directive
2014/30/EU as well as the current EN-standards, electrical and
occupational safety directives and the local or national regulations
respectively, are complied with (this is the responsibility of the
designer of the machinery into which the vacuum pump is to be
incorporated; see also the corresponding comments in the
EC-Declaration of Conformity).
l Make sure that the power supply is compatible with the data on
the nameplate of the drive motor
Installation
Seite/ Page/ Page 14
Recirculating cooling
Temperature Max. motor
class frequency
T3 (i/o) 50 Hz
l Make sure that an overload protection according to EN 60204-1 is
provided for the drive motor
l Make sure that the drive of the vacuum pump will not be affected
by electric or electromagnetic interference; if unsure please seek
advice from your Busch representative
If the direction of rotation of the pump is wrong, serious damage may
occur.
In order to change the direction of rotation, two phases on the motor
must be reversed.
If the vacuum pump is delivered without drive motor, a drive motor
must be mounted according to the following specifications:
Motor type 3ph motor - synchronous motor
Number of poles 2
Size
BG 100
COBRA NC 0100 B
Size
BG 132
COBRA NC 0200 B
Size BG 132
COBRA NC 0300 B BG 160 with adapter flange
Fixing type Flange, IM 3001 (IM B5)
Assembly position Shaft horizontal
Network frequency max. 50 Hz, resp. 60 Hz. See nameplate of
the vacuum pump
Frequency converter Authorized for all vacuum pumps with di-
running rect cooling system
Network voltage Customised
Protection type Customised
Explosion protection In regard to its explosion protection, the
motor must have at least the same protec-
tion level as the vacuum pump for the out-
side area ("outside" (o)). See nameplate of
the vacuum pump. A higher protection le-
vel, for the temperature class, can also be
used.
The highest permissible motor power is regulated according to the
operating frequency and the operational mode, see table below:
Highest permis-
sible motor power
COBRA
Frequency
for direct network
connection
50 Hz
NC 0100 B
60 Hz
50 Hz
NC 0200 B
60 Hz
NC 0300 B 50 Hz

Motor mounting instructions

Before the mounting of the motor, the coupling must be installed
between the motor and the vacuum pump. Respect the Installation and
Operating Instructions of the coupling. Regarding the explosion
protection, the coupling must show at least the same protection degree
like the vacuum pump for the outside category ("outside" (o)). See the
Highest permis-
sible motor power
using a frequency
converter
3 kW 4 kW
4 kW 7,5 kW
5,5 kW 7,5 kW
7,5 kW 11 kW
7,5 kW 11 kW